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Table 1 Clinical data in two patient groups

From: Strain-time curve analysis by speckle tracking echocardiography in cardiac resynchronization therapy: Insight into the pathophysiology of responders vs. non-responders

  Responders Non-responders P value
n 10 9  
Age (years) 57 ± 11 60 ± 6 0.496
Female Gender, n (%) 5 (50 %) 4 (44 %) 0.809
Weight (kg) 87 ± 18 91 ± 19 0.669
BSA (m2) 2.0 ± 0.3 2.1 ± 0.3 0.632
LBBB, n (%) 10 (100 %) 9 (100 %) NA
Non-ischemic etiology, n (%) 10 (100 %) 9 (100 %) NA
Sinus rhythm, n (%) 10 (100 %) 9 (100 %) NA
CRT-D, n (%) 10 (100 %) 9 (100 %) NA
Follow up from implant (months) 8.5 ± 4.8 9.0 ± 5.2 0.832
NYHA III/IV – pre, n (%) 8 (80 %) 9 (100 %) 0.776
NYHA III/IV – post, n (%) 2 (20 %) 5 (55 %) 0.109
QRS width (ms) – pre 167 ± 18 169 ± 22 0.789
QRS width (ms) – post 153 ± 18 157 ± 26 0.771
  1. Values are mean ± SD or n (%). BSA body surface area, LBBB left bundle branch block, CRT-D cardiac resynchronization therapy defibrillator, NYHA New York Heart Association